Liverpool, NY -- Liverpool Central School District officials said Donlin Drive Elementary was locked down briefly this afternoon as a precaution.

Superintendent Richard N. Johns said the school experienced a situation where staff could not identify an adult in the building and as a precaution went into lockdown mode until the person was identified. The person turned out to be a substitute employee who did not understand protocol.

The district started running lockdown drills earlier this month in all of the district's buildings and held a meeting for parents Feb. 6 on the district's security and safety protocols. Johns told parents at the meeting that one of the areas the district needs to improve in is making sure substitute employees are trained and understand protocol.